Carbon remover



Patented Feb. 21, 1928.

UNITED STATES PATENT OFFICE.

WILLIAM. E.

GROSVENOR, OF NEW YORK, N. Y., ASSIGNOR T 0. H. DURFEE PRODUCTS CORPORATION, OF IBELLEVILLE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

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No Drawing.

This invention relates to mixturesfor removing carbon deposits from the inter or walls of the chambers of internal combustion en es.

lthough various compositions and mixtures for this purpose have been proposed and used heretofore, none of such products embodies all of the properties favorable for universal use in removing carbon deposits of various characteristics. It appears to be necessary that such mixtures embody some ingredient having physio-chemical properties causing the material to penetrate deeply into the carbon incrustations. One or more of the ingredients of the mixture should also be such as to dissolve the greasy part of the carbon crust, thus liberating the hard carbon which is then blown out. The characteris tics of the carbonaceous deposit Will vary between wide limits under various conditions of combustion and with the use of fuels and lubricating oils of var ing qualities and compositions. In view 0 this fact I have found it desirable to include in the carbon removing mixture a plurality of materials having a solvent action effective upon most, if not all, of the carbonaceous deposits formed in the present conventional types of internal combustion engines.

Various and more specific objects, features and advantages of my invention will more clearly appear from the detailed description given below, the invention comprising the novel product as above referred to and as described by way of examples in the following specification, the invention being more particularly pointed out in the appended claims.

A suitable mixture embodying my invention may be made with various ingredients added in quantities substantially as follows:

2 oz. fusel-oil (or alternatively iso-propyl alcohol).

1 pt. denatured alcohol (C. D. #1).

1 pt. acetone.

2 oz. concentrated ammonia water 26 Baum.

% oz. identifying color, such as caramel.

Water to make up one gallon.

This mixture has been found to be very penetrating and capable of attacking carbon deposits having a wide variety of characteristics. The various ingredients of this mixture are easily obtainable and are relatively inexpensive and are easily miscible. Also, when the ingredients are thus combined, no

Application filed February 11, 1927. Serial No. 167,602.

harmful corrosive effects are discernible on the interior parts of engines after the use of this carbon remover. A mixture of this nature may be safely handled and stored in quantities by the dealers without substantial fire hazard.

The denatured alcohol, together with the various higher alcoholic materials of the fusel-oil including amyl alcohol and a small amount of iso-propyl alcohol, offer the necessary variety of solvent properties to quickly dissolve the various forms of greasy binders which retain the carbon particles. For practical purposes iso-propyl alcohol, which is known commercially as Petrohol, may be easily andcheaply obtained and used alternatively with the fusel-oil. The use of such alcoholic materials appears to substantially improve the property of the carbon remover to penetrate into the under surface of the carbon incrustations.

In using the above mixture, the engine is preferably operated until well heated. Then approximately 1 ounce of the mixture is introduced in each cylinder as by removing the spark plugs. The cylinders are then closed and the engine operated for several minutes. The carbon will then be blowil out through the exhaust in a very dry powdered or granulated form. If the carbon deposits are unusually heavy, the operation may be repeated several times until the interior walls of the engine chambers become bright and substantially entirely free from carbon. An important characteristic of the mixture is that the carbon is liberated in a finely divided dry form which is quickly blown away and does not tend to stick in the passages, valves, etc., where it would cause further trouble.

It has been found desirable to add the coloring material as above noted for the purposes of identifying the mixture and to prevent any danger of confusion with other products sold by the same dealers.

While I have described my invention in considerable detail and with respect to ceras come within the spirit of the invention.

What I claim as new and desire to secure by United States Letters Patent is:

1. A mixture for removing carbon deposits from internal combustion engines formed by mixing the following ingredients in proportions in the neighborhood of the following:denatured alcohol, 1 pint; acetone, 1 pint; fusel-oil, 2 ounces; concentrated ammonia water, 2 ounces; suflicient Water to act as an efi'cctive vehicle when vaporized.

2. A mixture for removing carbon deposits from internal combustion engines formed by mixing relatively small quantities of fusel oil and concentrated ammonia Water with relatively larger quantities of acetone and denatured alcohol, and a substantial amount of water.

3. A mixture for removing carbon deposits from internal combustion engines formed by mixing relatively small quantities of ammonia and an oily liquid comprising a mixture of higher alcohols, one of which is iso-propyl alcohol, with relatively larger quantlties of acetone and denatured alcohol, and a sufficient amount of water to act as a vehicle for carrying away WILLIAM M. GROSVENOR. 

